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Bottom bracket removal on Truvativ ISIS crankset

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Bottom bracket removal on Truvativ ISIS crankset

Old 06-30-08, 12:16 PM
  #1  
daveydave
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Bottom bracket removal on Truvativ ISIS crankset

I have a project that I am working on. The frame is a Fuji Rubaix Pro '06 frame with an

ISIS bottom bracket.

I wish I had a really nice set of tools, but I've just got one of those Nashbar $50 starter

sets.

After getting the non-drive side crank off with an 8mm allen wrench, I am now at the point

where I can see the splined ISIS BB. I'm not exactly sure what to do because of a lack of

experience and probably the lack of a tool to accomplish the next step.

a.) Do I have to remove the adapter cups on the non-drive side next? I believe the Park

BBT9 tool or the Truvativ GXP tool are used to remove the cups. Any advice on how to do

this without the correct tool? Any tips?

b.) Do I need a bottom bracket extractor tool that didn't come with my kit, but is somewhat

proprietary to the ISIS BB?

c.) Would applying some Tri-Flow, placing a rag over the splined non-drive side and

knocking the bracket toward the crank side with a mallet loosen this bottom bracket out?

I appreciate any information on my thoughts above or what's wrong with my thought process.

I guess I'm most concerned about completing the next step properly, and not sure exactly

what that next step might be. If I have the order of steps to remove the BB, can you provide advice on where my thought process might be wrong?

Thanks!

Dave
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Old 06-30-08, 12:27 PM
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MudPie
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This site will guide and explain the process for bottom bracket removal:

http://www.parktool.com/repair/readhowto.asp?id=94
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Old 06-30-08, 12:31 PM
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An ISIS BB installs into a frame the same was a standard square taper BB does.
Once you remove the cranks ARMS off the BB spindle with a crank extractor you need to remove the non-drive side BB cup with a BB cup tool. it will be the same one that is used to remove a square taper BB. The non-drive side BB cup unscrews in a counter clockwise direction like a regular screw. You'll then remove the BB through the drive side. The threads on the drive side are reversed so they'll loosen up in a clockwise direction.

the tool you need to remove the BB looks like this
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Old 06-30-08, 12:34 PM
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You need a current-model BBT-22 for ISIS. The BBT-9 is for Shimano splined. Look at the Park site, as recommended previously.

Last edited by JanMM; 06-30-08 at 12:37 PM. Reason: improvement
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Old 06-30-08, 01:18 PM
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First,

Thanks to everyone. Not that I have finished the process, but I'm getting a handle on what I might need.

I have BBT-22. The only issue with being able to use it is that this frames bottom bracket still has the 3 - 5 expansion cups for adjusting on each end. Thus, it spreads wider than 108mm (or standard english) when the cups are in place. If I can get the 20 notch cups out of the way, think I can get to using BBT-22 to remove the BB.

Is that where BBT-9 or probably some other tool (like it, but for ISIS) for removing the 20 notch cups would probably be of help?

I've tried the threaded removal tool that goes within the spline, but I assume the one that came with my kit is for Octalink or Square Tapered systems, it's just too wide to thread inside the spline.

So, I'm assuming I need to get BBT-9 and then pull with BBT-22**********??

Dave

Originally Posted by JanMM View Post
You need a current-model BBT-22 for ISIS. The BBT-9 is for Shimano splined. Look at the Park site, as recommended previously.
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Old 06-30-08, 02:40 PM
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The BBT-22 is for removing the 20-notch cups. The BBT-9 is only for Shimano 16-notch cups. Put it away somewhere else. You have removed the left/non-drive crankarm? Or, did you only remove the crankarm fixing bolts? Pictures?
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Old 06-30-08, 02:50 PM
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According to here

http://www.fujibikes.com/2006/bikes.asp?id=127#

the bike came with an external bearing bottom bracket so you need these instructions from the Park Tool site

http://www.parktool.com/repair/readhowto.asp?id=95
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Old 06-30-08, 04:33 PM
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My experience is only with the first-generation ISIS, not the external ones.
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